Crushing-roll.



T. A. EDISON,

BEING ROLL.

AlPLlGATION FILED SEPT. T. 1905.

Patnted June 28, 1910.'

fizaaiziar: v

run. run s'ra'rns PATENT OFFICE.

GRUSHING-ROLL.

Specification of Letters Yatent. v Patentfid {ii 28, 1910..

Application filed September '2, 190$. Serial No. 333,607.

To-oll whom it may concern:

Be it known that I, TrIoMAs A. EDISON,

a citizen of the United States, residing at resist the enormous stresses to which they.

able segments or Llewellyn Park, Grange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Crushing-Rolls, of which the following is a description.

My invention relates to crushing rolls and more particularly to crushingrolls of very massive construction known as giant rolls, and which may be used for crushing or breaking large masses of rock such as (re inent rock and limestone used in the manufacture of Portland cement. struction of a roll of this character it is nccessary to provide the body of the roll with roughened wearing surfaces which may be renewed from time to time as they become worn, and means must be'provided for se curing said Wearing blocks to the body of the roll in such a way as to enable them to are subjected during the crushing operations without becoming loosened, and at the same time to permit them to be readily removed from the body of the roll and replaced whenever desired.

My invention has for its object the prodnction or a roll having the above characteristics and more particularly the production of a roll of this character wherein the arts can be readily manufactured, and my after described and claimed.

Reference is hereby made to the accompanying drawing of which- Figure 1 is a side elevation of a crushing roll constructed in accordance with my invention and applied to a driving shaft which is shown in section; Fig. 2 is a section on line 2-2 of Fig. 1; Fig; 3 is a side elevation of the body of the crushing roll; Fig. 4 is a similar view of one of the removwearing blocks which is i dzapted to be applied to the exterior of the sa'i body; Fig. 5 is a detail view showing the means for locking the head of one of the holdin bolts against rotation.

In a lot the views corresponding parts are designated by the same reference characters. a

' The body of my improved crushing roll is a massive casting 1 of the form shown, having a circular bore 2 adapted to fit upon In the cona driving shaft a and held against rotation by a key I) which occupies the keyway 3. Longitudinal movement of the crushing roll with respect to the shaft a is prevented by a heavy screw lthreaded in the hole 5 and having an extension 6 which engages a corresponding recess in the shaft a. The

series of an faces 7, preferably forming an octagon as shown. Each of these faces is in the form of a dovetail.

Each end of the castin l is formed with a continuous flange 9 trough which the bolts for holding the removable wearing blocks are adapted to pass' The said blocks are in the form of segments 10 each of ing a keyway 12. The ends of each segment are bored and countersunk to'receive the holding'bolts 13 and the intermediate portion is thickened or elevated as shown at 1%,

with corrugations 15.

Each of the segments 10 is firmly clamped to the body 1 by a set of holding bolts 13 four being suiiicient for each segment, an a key 16 which is'separate from both the segments and body, is used for resisting the shearing stress. Heretoiiore the shearing stress has been carried by a rib on the segment adapted to engage a groove in the body, but such construction is objectionable lapping the under surface of the segment, as therib interferes with these operations. By forming the segment with a keyway an using a key on the body or core, thisobjection is avoided, thereby cheapening the cost of manufacture. This isof great practical importance since it is necessary that there should be an exact fit between the seg-' ments audthe body of the roll. If there is the slightest looseness of fit the enormous in practice would quickly work them free and causethe holding bolts to be sheared ofi. In assembling the device the keys 16 are first placed in the seats 8 and secured against pass through said keyinto sockets drilled in the casting 1. The segments 10 arethen a'p lied so that thekcyways 12 engage the 'eys 16 and the fiat surfaces ll-rest upon Fig. 2, said elevated portion being formedcxterior of the body 1 is provided with arovided with a keyway 8, which may be which is provided with a flat surface 11 havon account of the difficulty of machining and shocks to which the segments are subjected longitudinal movement by pins 17 which the corresponding surfaces 7. The holding bolts 13 are then gassed thfrmigli the segmarks 10 and 9,, am] uquare nu'sl, are zthi'emlsd on the ands i th- "alts.

The head 22 6f each he milled with a noicls m may be turned sa as 4 l8 being held :QiIZa-tmll surface 20 01? film lastly alsu profiled with gnu 0r mum met or keys 23 preferably (if steel aml into recesses therein and piujecting therefmm in such a manner as to eugage the teeth 24: with which the walls of the circularrecess of the segment is formed. El ssa keys are -211- serted in pesition to engage the teeth 24-. after the bolts have been screwfil -l1QZl1Q, being held in place Within the bolt 113ml by being pained over, is common;

Having 110W clesciibed my invention, what 3 I claim as new and dsire iii SBCUZ'B by ai ters Patent is as fallows:

1. In a crushing roll, the cembination of a bod provided ai; each and with overhanging angegs, fHKll'HfVliEg an mzte'rior longitudinal kyway pmviled with one or more massif:

.piuiaent longitudinal movement of said key,

substanfiiially as set faith.

2. In a-cr-ushiiig roll, the cumbinriiirm of 21 130d having 2, series of external fiat S111- and provided at each and with overhanging flanges, each of said flat surfaces being provided with a keyway a series of segments, each of which has 9. flat surfacepi'ovided Wlill a key-Way, means for SGCUF- ing said segments to saicl 'body and :1 key occupying the keyways 03? sairl body and segmerits, and pins for securing said key to the said body, substantially as set forth.

This specification signe i and witnessed this l th day (if Sept. 1906.

THOMAS A. EDISUN. Witnesses FRANK FRANK L. DYER, I). Luwzr. 

